Principal Cities: The largest city in the CEST timezone is Berlin from Germany with population about 3.426 million people. Other major cities in the area are Madrid, Rome, Paris, Budapest

Daylight Saving: Central European Summer Time (CEST) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Central European Time (CET).

Start: Central European Summer Time (CEST) starts annually on the same date and time. and clocks were set one hour forward on Sunday, March 29, 2020, at 2:00 (2:00 am) local time. End: Central European Summer Time (CEST) ends annually on the same date and time. and clocks are set one hour back on Sunday, October 25, 2020, at 3:00 (3:00 am) local time.

German: MESZ - Mitteleuropäische Sommerzeit

Klein Reken, Germany timezone map

Klein Reken, Germany representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data